Have Amy play with you while the three of you chat

You remember that Liz (and possibly Amy) is uncomfortable with you being half-naked for no good reason. But you're not quite in the mood for sex again, and definitely not in the mood to put yourself back into jeans... You strike on an idea.

"Amy, why don't Liz and you switch seats? You can sit on the couch behind me and play with my cock, and Liz can sit in your chair and watch."

Amy brightens up. "That sounds like a good idea! You don't let me jerk you off enough, John." Liz looks comfortable with the idea, and you notice her smirking as she looks down at your erect manhood.

Amy takes her towel and arranges it on the couch, sitting down. "Hey Amy, why don't you take your top off? I want to feel those wonderful tits on my back."

Amy nods. "Sure thing." Reaching behind her back, she undoes a clasp before pulling her shirt and bra off in one smooth motion.

Liz looks on curiously at her disrobing sister as she sets herself up in the chair, showing off her hairless and decorated pussy. Her lips are visibly ruddy and swollen, and the two arrow tattoos pointing towards it have gotten no subtler.

You sit down in front of the now-nude Amy, her legs spread wide to accommodate your hips. She reaches around, gently grasping your shaft. You feel her slip her other hand between you, and you realize that she's taking moisture (and likely semen) from her own opening for lubrication.

Liz opens her beer and takes a swig. "Are you sure you're not a transvestite?" she asks, her eyes fixed on your member and her sister's hands.

"Nah," says Amy casually, "John is just a horny guy, isn't that right?"

You can't possibly deny it. "Guilty as charged."

"For such a randy guy, you've hardly taken a look at my pussy," says Liz a bit plaintively, wiggling her abdomen around.

You're a bit puzzled as to what's going on. "Uh..." you begin, glancing down at her pussy. You come to realize that you've been half-way avoiding looking below Liz' waist; you came looking to see Amy's body, but you're apparently not sure how to deal with half-naked strangers.

Amy chuckles. "John is an academic primatologist specializing in bottoms, Liz. He probably stares at pussies quite enough," she explains, though she doesn't seem entirely convinced herself.

"Not really," you say, "we just got caught up doing other things." You **** yourself to relax and gaze down at Liz' vulva. She smiles and wiggles slightly, drinking from her beer. As you watch, you swear you can see her pussy opening slightly.

"Oooh," Amy teases, "my little sister has a crush!"

"No," Liz protests, "I'm just a little flushed from having John's... Penis...swelling in my mouth." She looks down and watches Amy jerk you off as she continues. "I do have to admit that it's pretty sexy, though... Do you like it when women look at your penis, John?" she asks, somewhat clinically.

"Yes," you admit. "What about you, Liz? Do you enjoy men looking at your pussy?"

Liz looks confused. "What do you mean? Of course I do."

"John, I know you aren't a complete idiot with women," Amy speaks up. "You should know this. Women get a lot of their sense of personal fulfillment from having people look at their pussies. If you were meeting up with an attractive woman on a date, and she sat down spreading her legs open wide like Liz and I do, wouldn't you look down at her exposed pussy lips?"

"Uh, yeah," you reply honestly, unsure where this was going.

"See, there you go. It's just the polite thing to do. The reason why women never wear bottoms, and go to such lengths to sit down spread-legged, is to get people, and especially men, to look at their pussies. It makes them feel wanted and attractive to know that people enjoy looking at the most feminine part of them."

Liz smiled. "Yeah, why do you think I've got these big arrows pointing down at my lady-bits? Some guys take us exposing ourselves for granted, and need the extra hint to spend some time staring at my cunt. That's why I feel like you're a closeted transvestite; you obviously like women taking in your, uh, your manhood," she finishes, slightly embarrassed to be talking about your genitals.

"Am I that unusual?" you ask, feeling stupid immediately for asking.

"You kind of are," Amy says, chuckling. "Do you really not realize that women appreciate men staring at their pussies? You were chatting with me about my cunt just before you fucked me."

You look to Liz again, whose eyes flick impatiently at her pussy. You take the hint and give it a good long stare. "Your pussy is definitely getting a bit wet Liz," you say, taking the bait.

"Yeah," Liz says. "I have to admit that looking at Amy playing with a... Hard, uh, penis is making me a bit excited."

"You're perfectly comfortable talking about your pussy getting wet, and you're happy to put my cock in your mouth, but you have problems even saying the word 'penis'?"

Liz takes another swig of her beer, looking distinctly uncomfortable. "Um. I think that it's very nice? To be honest I'm kind of thinking about how you and my sister were fucking just as I arrived. I'm sorry I interrupted you... Maybe your mind is more on Amy's pussy, and that's why you haven't been looking at mine as much?"

You can feel Amy tensing up slightly behind you... This is getting a little awkward.